Rotary fan



(No Model.)

*0. vE. TUNEL-IUS'. ROTARY EAN.' l No..29'3,5286; PzauentedA Feb. V12, 1.884.

\ ATTORNEY .IINTTE STATES PATENT OFFICE;

CHARLES lil. TUNELIUS, OF CHICAGO, ILLINOIS.

ROTARY FAN.

SPECIFICATION forming part of Letters Patent No. 293,286, dated February 12, 1884,

' Application filed July 16, 1883. (No model.)

4To a/ZZwhom t may concern.:

Beit known that I, CHARLES E. TUNELIUs, of Chicago, inthe county of Cook and State of Illinois, have invented certain new and useful ImprovementsinRotary Fans; andIdohere- .by declare that the following is a full, clear,

' removal and abandonment of the entire rotary fan. This I accomplish by making each vane removable from a hub or boss made of two or more parts, and provided with means for receiving and locking therein the shank of said vanes, as will be hereinafter more fully described, and as illustrated in the drawings, in which- Figure 1 is a vertical Alongitudinal section of my improved fan. Fig. 2 is a front view of the same. Fig. 3 is a perspective view with the washer and nut removed, and Fig. 4L is a perspective view of one of the vanes.

4In the drawings, A represents a vane having an angle-iron rib, c, on either side, whichA unite, after leaving thebase of said vane, to form a T-iron shank, B. Near the extremity of this shank,in that part of the T iron which is at right angles to the other two arms, is a transverse mortise, Z1, forming a cog, c, on th extremity of said shank.

The end of the shaft C on which the boss of my rotary fan is placed is preferably stepped, and the extremity of the stepped portion is screw-threaded.

The boss of the `rotary fan is composed of two sections, D and E, and their contiguous faces are brought nearly together by means of a nut, F, on the screw-threaded extremity of the stepped part of the shaft. In the inner face of the section E of the said boss is a series of mortises corresponding to the number of vanes, and vcorresponding to the shape of the extremity of the T-iron shank B. Thus there is a broad shallow mortise, d, corresponding in depth and width to the horizontal T-iron shank B, and a central mortise, fl',

designed to receive the mortised extremity of 5 5 the said T-iron, and therefore being made deeper immediately next the annular bearing-surface of the said boss to receive the cog c. These mortises divide the face of the said section E int/o a number of equal spaces. will therefore be readily perceived` that if these mortises intersect each other near their radial centers, the contiguous end edges of the Y horizontal arms of the T-iron will be corre? It 6o spondingly beveled, to permit their easy adjustment imposition.

Vhen the vanes are all inposition, section E-which is, in fact, a washer-is brought to bear against the contiguous surfaces of the T- iron shanks, to hold them securely in position, 7o

and is held in such position by means of a nut,

F, on the end of the shaft, or by bolts passing through the same and into the section E, as shown in dotted lines in Fig. 2.V

If it is desired to have a vane with two arms,

which is usual when the fan is very broad, the mortises are made in section E, of which there are two, with a sleeve placed between them, the boss being held together similar to the single-arm vane.

I do -not conne myself to the particular construction of that part of the shank B Within the boss, or the general design of the mortises for receiving the same, as it is obvious many immaterial changes could be made in that re- 8 5 'speet without departing from the spirit of my 2. The combination, with the Vane having In testimony'that I claim the foregoing as 1o angle-iron ribs and a T-iron shank7 recessed 'my own I hereunto affix my signature n in the mannerhereinbefore set forth, of aboss presence of two Witnesses. composed of two sections, one of which is I mortised to receive the T-iron of said shank, CHARLES E. TUNELIUS. and the other of which is it Washer bearing i against and confining said shank in position, W'itnesses:

the Whole kept together by means of bolts or S. S.'SoHoFF,

nuts. A FRANK D. THoMAsoN. 

